package datastructure;

/**
 * @author XY
 * @version 1.0
 * @date 2022/3/16 16:50
 * @Description
 */
public class Test {

    class A{
        public A(){
            System.out.println("123");
        }
    }
    class B extends A{
        public B(){
            System.out.println("456");
        }
    }

    public static void main(String[] args) {

        Test t = new Test();
    }
}
